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Milltek Sport downpipe and connecting pipework for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition, product photo

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Milltek Sport downpipe and connecting pipework for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU634), product photo

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Milltek Sport downpipe and connecting pipework for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU555), product photo

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Milltek Sport downpipe and connecting pipework for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU554), product photo

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Milltek Sport downpipe and connecting pipework for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU635), product photo

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Milltek Sport exhaust system parts for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU595): pipework, silencers and polished silver tailpipe tips

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Milltek Sport exhaust system parts for 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (part SSXAU598): pipework, silencers and black tailpipe tips

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S7 C7 4.0 TFSI

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Regular price: $2,236.00
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Sale price: $2,236.00
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Type: Catless Downpipe (Race/Track only) Bypass: Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back

Product variants

Subtotal: $2,236.00

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Milltek Sport Catted & Catless Downpipes - 2014-2018 Audi RS7 / 2013-2018 S6 / S7 C7 4.0 TFSI

Subtotal: $2,236.00

Not sure it fits? Text us your VINSee all fitment

Vendor: Milltek Sport

SKU: SSXAU634

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Overview

Milltek Sport catted and catless downpipes, cat pipes and front pipes for the Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018). These parts open up the hot side of the exhaust, cut backpressure and sharpen throttle response. Pick the option that matches your exhaust: some are built to fit a Milltek cat-back, others bolt to the stock cat-back.

Compare every part number

Part #	Option	Fits with (Milltek)	Stage 2 ECU remap	Race/Track only	Pipe size	Fit time
SSXAU634	Catless Downpipe (Race/Track only) Bypass: Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back	Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)	Required	Yes	3.00" (76.20mm)	-
SSXAU555	Catless Downpipe (Race/Track only) Bypass: Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Spo	Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)	Required	Yes	3.00" (76.20mm)	-
SSXAU554	Catted Downpipe (100-CPSI Hi-Flow Sports Catalyst, Race/Track only): Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the	Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)	Required	Yes	3.00" (76.20mm)	-
SSXAU635	Catted Downpipe (100-CPSI Hi-Flow Sports Cat, Race/Track only): Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the [SSXAU635]	Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)	Required	Yes	3.00" (76.20mm)	-
SSXAU598	FULL: Non-Res with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Non-Res with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-
SSXAU597	FULL: Resonated with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Resonated with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-
SSXAU599	FULL: Road+ with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Road+ with 76mm Downpipes. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-
SSXAU595	FULL: Non Res with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Non Res with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-
SSXAU596	FULL: Resonated with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Resonated with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-
SSXAU594	FULL: Road+ with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Road+ with 76mm Downpipes and 100cell cats. Uses OE Tips. Requires a stage 2 ECU remap (lambda cables need extending)	Required	Yes	2.75" (69.85mm)	-

"Race/Track only" and "Stage 2 ECU remap" are shown only where Milltek states them. A dash means Milltek does not state it for that part.

What comes with each part number

SSXAU634 (Large-bore Catted Downpipe Bypass Pipes): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Connecting pipe to OE Cat Back System; 1 x RH Connecting pipe to OE Cat Back System
SSXAU555 (Large-bore Catted Downpipe Bypass Pipes): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Connecting Pipe to Milltek Catback; 1 x RH Connecting Pipe to Milltek Catback
SSXAU554 (Large Bore Downpipes and Hi-Flow Sports Cats): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x RH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car)
SSXAU635 (Large Bore Downpipes and Hi-Flow Sports Cats): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Secondary 100-CPSI Hi-Flow Sports Cat (under car) to OE System; 1 x RH Secondary 100-CPSI Hi-Flow Sports Cat (under car) to OE System
SSXAU598 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Connecting Pipe to Milltek Catback; 1 x RH Connecting Pipe to Milltek Catback; 1 x Centre Silencer Replacement Assembly; 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)
SSXAU597 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Connecting Pipe to Milltek Catback; 1 x RH Connecting Pipe to Milltek Catback; 1 x Centre Silencer Assembly; 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)
SSXAU599 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Connecting Pipe to Milltek Catback; 1 x RH Connecting Pipe to Milltek Catback; 1 x Centre Silencer Assembly (Road+); 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)
SSXAU595 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x RH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x Centre Silencer Replacement Assembly; 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)
SSXAU596 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x RH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x Centre Silencer Assembly; 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)
SSXAU594 (Full System): 1 x LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) (Cerakote Semi-Gloss Black Finish); 1 x LH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x RH Secondary 100-CPSI Hi-Flow Sports Catalyst (under car); 1 x Centre Silencer Assembly (Road+); 1 x ValveSonic LH Rear Silencer (OE motors to be re-used); 1 x ValveSonic RH Rear Silencer (OE Motors to be re-used)

Catted and catless downpipes

A catted downpipe keeps a catalytic converter in the downpipe. A catless downpipe (de-cat) replaces it with a straight pipe. Each option name above says which one it is.

Fitment

Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition, 2013-2018. US-market model listing. Confirm your exact model, engine and options before ordering.

About Milltek Sport

T304L stainless steel, CNC mandrel bent.
Designed and developed in Derby, UK with a US facility in Knoxville, Tennessee, and tested at the Nürburgring.
Company founded in 1983.

Warranty

Milltek covers most products with a lifetime guarantee. Downpipes, hi-flow catalysts and any part with valves are covered for 2 years or 80,000 km, and electronic products for 2 years. Claims go through the authorized dealer you bought from, and cover the original purchaser only. Full terms: millteksport.com/Warranty.html

Notes

Some options need a Stage 2 ECU remap. Read the option name before you order.
Catless downpipes and other cat bypass parts replace emissions equipment. They are sold for off-road and competition use where local law allows. You are responsible for checking the rules that apply to your vehicle.
Fitting times are Milltek estimates for a professional installer.

Fitment

Year	Make	Model

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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